No very detailed or elaborate statistics will be here employed, the aim of this chapter being merely to draw attention to certain broad facts or relations disclosed by the Census and the Registrar-General's Report. _The Surplus of Women._--It is a well-known fact that in this country women exceed men in numbers. The surplus increased slightly but steadily from 1851 to 1901, and remained almost stationary from 1901 to 1911. In 1901 and 1911 there were in every 1000 persons 484 males and 516 females. The excess of females varies at different ages. The number of boys born exceeds the number of girls in a proportion not far from 4 per cent, sometimes a little more, sometimes a little less. But boy infants run greater risks at birth and appear to be altogether more susceptible to adverse influences, for their death-rate is usually higher up to 3, 4 or 5 years old. The age-group 5 to 10 varies from time to time; in 1901-1910 the average mortality of girls was the higher: in 1912 the average mortality of boys was very slightly higher. From 10 to 15 the female death-rate is higher than the male. The age-group 15 to 20 shows very curious variations in the relative mortality of males and females. From 1894 onwards the males of that group have had a higher mortality than the females, whereas previous to that date the female mortality was the higher, in all years of which we have a record save two--1876 and 1890. The Registrar-General can suggest no explanation of this phenomenon.[19] It may be remarked, however, that girls generally now obtain more opportunity for fresh air and physical exercise than in former years, which may account for some of their comparative improvement in this respect; also that in the industrial districts a great improvement has taken place in the administration of the Factory Act since the appointment of women inspectors and the general raising of the standard after the Act of 1891, and girls may naturally be supposed to have profited more by this improved administration than have youths of the other sex, who are not included under the Act when over 18 years, and in many cases pass into industries unregulated by law. The following table shows the death-rates per 1000 of male and female persons in England and Wales, 1913, and the ratio of male per cent of female mortality at age periods, as calculated by the Registrar-General. DEATH-RATES AT AGES, 1913.